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睡莲科莲属植物在分类学上分为三个种,其中常见于栽培的有两个种,即N.nucife-ra和N.lutea。它们的形态相近似,但分布的地域却完全不同。N.nucifera主要分布在中国、日本、菲律宾、马来群岛、印度、印尼、伊朗等东亚国家和地区,N.lutea则限于分布在北美,它们的分布为太平洋所隔绝。在形态上N.nucifera不仅体型大,而且花大、重瓣品种多、花色多样,随雄蕊的不同瓣化程度,而出现半重瓣、重瓣、重台、千瓣莲等各种花型。花色有白、粉、红各色,唯独未见黄花类型。N.lutea的株型较小,叶较小而深绿,花为单瓣且是独一的黄色类型。
Nymphaeaceae is divided into three taxonomic categories, of which two are commonly cultivated, namely N. nucifera and N. lutea. Their morphology is similar, but the distribution of the area is completely different. N.nucifera is mainly distributed in East Asia countries and regions such as China, Japan, Philippines, Malaya, India, Indonesia and Iran. N.lutea is limited to North America and its distribution is isolated from the Pacific Ocean. In terms of morphology, N.nucifera is not only large in size, but also large in flower size, with more varieties of petals and more variety of colors. With the different degrees of petalization of stamens, N.nucifera appears in various forms such as semi-double petals, double petals, . Color white, pink, red, except no yellow type. N. lutea has a smaller plant type with smaller and darker leaves, with single flower petals and the only yellow type.